PHOTOCATALYTIC DEGRADETION OF METHYLENE BLUE AND ANTIBACTERIAL ACTIVITY OF POLYANILINE TIN(IV) MOLYBDOPHOSPHATE COMPOSITE

Abstract

Polyaniline-tin (IV) molybdophosphate (PANI /TMP) was prepared using sol–gel method by mixing polyaniline (PANI) gel into the inorganic precipitates of Tin (IV) molybdophosphate (TMP). The composite was characterized by various techniques such as X-ray diffraction, UVVisible, Fourier transform, scanning electron microscope, photoluminescence. Photocatalytic activities and antimicrobial efficiencies of the bare polymer Polyaniline, the inorganic composite Tin (IV) molybdophosphate and the composite polyaniline- tin (IV) Molybdo Phosphate were evaluated using methylene blue as a model organic pollutant and Gram negative and Gram positive bacteria as test microbes respectively. Photocatalytic and antibacterial activities of Polyaniline - tin (IV) molybdophosphate nanocomposite were found to be the highest. The results obtained indicate the degradation efficiency of 72.96% in 180 min. exposure time using visible light irradiation. Mechanism of scavenger reaction also assure the most important species in the degradation process be ( .O2 ) and (OH. ). Highest photocatalytic degradation efficiency of the polyaniline Tin(IV) molybdophosphate composite was obtained at initial concentration of 10 ppm MB, 100 mg/L of catalyst load and at pH=8. Antibacterial efficiency of the polyaniline - tin (IV) molybdophosphate support over both Gram negative and Gram positive bacteria were found to be relatively higher than polyaniline and Sn (IV) molybdophosphate.